1983 ROYAL WEDDING CHARLES & DIANA OFFICIAL SGO28g WITH DEEP ULTRAMARINE SURCHARGE FINE UNMOUNTED MINT. "GUM STUCK TOGETHER" MEANS THAT THE STAMPS OR SHEETS HAVE BEEN EXPOSED TO WATER OR DAMPNESS, AND ARE THEREFORE STUCK TOGETHER, AND WOULD HAVE TO BE SEPARATED BY SOAKING OR STEAMING.

1983 ROYAL WEDDING CHARLES & DIANA OFFICIAL SGO28g WITH DEEP ULTRAMARINE SURCHARGE FINE UNMOUNTED MINT. "GUM STUCK TOGETHER" MEANS THAT THE STAMPS OR SHEETS HAVE BEEN EXPOSED TO WATER OR DAMPNESS, AND ARE THEREFORE STUCK TOGETHER, AND WOULD HAVE TO BE SEPARATED BY SOAKING OR STEAMING.